US5957191A - Casting method and apparatus using a resin core - Google Patents
Casting method and apparatus using a resin core Download PDFInfo
- Publication number
- US5957191A US5957191A US08/707,455 US70745596A US5957191A US 5957191 A US5957191 A US 5957191A US 70745596 A US70745596 A US 70745596A US 5957191 A US5957191 A US 5957191A
- Authority
- US
- United States
- Prior art keywords
- wall
- core
- increased thickness
- thickness portion
- molding cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/002—Castings of light metals
- B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/24—Accessories for locating and holding cores or inserts
Definitions
- the present invention relates to a casting method and apparatus in which a resin core is used.
- a core In the die casting of a metal product, a core is used for forming an undercut portion and a vacant interior of the product. In a gravity die casting process, a sand core is usually used because the sand core can be easily removed from the product after casting because it collapses easily.
- a resin core was proposed, for example, in Japanese Patent Publication No. HEI 6-91345, with a core made from thermoplastic resin that was removed from a product by heating the core and thereby melting the resin core.
- a resin core removal method is proposed in Japanese Patent Application No. HEI 7-164299 where the resin core, having a substantially uniform wall thickness, is taken out of the cast metal product by drawing before it is melted so that the drawing force can be transmitted in the resin core and the entire portion of the resin core can be taken out of the cast metal product.
- the above-described resin core, with a wall having a substantially uniform thickness still has the following problems.
- a portion of the resin core contacting the relatively thick portion of the cast metal product tends to be melted by receiving residual heat from the cast metal product. If this melting occurs, the accuracy of the shape and the dimensions of the portion of the cast metal product that contacts the melted portion of the core will be compromised.
- a shrinkage recess or cavity may also be caused in a surface of a portion of the cast metal product that contacts the resin core when the portion is solidified after the other portions of the metal product.
- the resin core may be destroyed in places if a load acting on a portion of the resin core from the molten metal, which flows into a molding cavity at a high speed and at a high pressure, exceeds the strength of the portion of the resin core.
- the resin core may also be destroyed in places if a load acting on a portion of the resin core from a pressure pin exceeds the strength of the portion of the resin core.
- An object of the present invention is to provide a casting method and apparatus using a resin core which is unlikely to be destroyed even if it receives a large heat and/or load.
- FIG. 1 is a cross-sectional view of a resin core during manufacturing, used in a casting method and apparatus according to a first embodiment of the present invention
- FIG. 2 is a cross-sectional view of the resin core of FIG. 1 after manufacturing
- FIG. 3 is a cross-sectional view of a resin core and a cast metal product showing a casting method and apparatus according to a second embodiment of the present invention
- FIG. 4 is a cross-sectional view of a resin core and a cast metal product showing a casting method and apparatus according to a third embodiment of the present invention
- FIG. 5 is a cross-sectional view of a resin core and a cast metal product showing that an increased thickness portion is not formed in the resin core and that a shrinkage defect is generated in the cast metal product;
- FIG. 6 is a cross-sectional view of a resin core and a molten metal injection gate showing a casting method and apparatus according to a fourth embodiment of the present invention
- FIG. 7 is a cross-sectional view of a resin core and a pressure pin showing a casting method and apparatus according to a fifth embodiment of the present invention.
- FIG. 8 is a cross-sectional view of a casting apparatus showing a casting method applicable to virtually any embodiment of the present invention.
- FIG. 9 is a graph showing the relationship between the temperatures of the resin core and the cast metal product with the elapsed time applicable to any embodiment of the present invention.
- FIGS. 1 and 2 illustrate a first embodiment of the present invention
- FIG. 3 illustrates a second embodiment of the present invention
- FIGS. 4 and 5 illustrate a third embodiment of the present invention
- FIG. 6 illustrates a fourth embodiment of the present invention
- FIG. 7 illustrates a fifth embodiment of the present invention.
- FIGS. 8 and 9 are applicable to virtually any embodiment of the present invention. Portions common or similar to all of the embodiments of the present invention are denoted with the same reference numerals throughout all of the embodiments of the present invention.
- FIG. 8 shows an apparatus for producing a cast metal product including a mold 8 and a core 1 set within the mold 8.
- the mold 8 and the core 1 define a molding cavity 9 for molding a cast metal product 4.
- the core 1 is made from thermoplastic resin.
- the core 1 includes a wall 3 defining a vacant interior 2 within the wall 3 so that the resin core 1 can be deformed utilizing the vacant interior when the resin core 1 is removed from the cast metal product 4 after molding.
- the wall 3 of the core 1 includes at least one increased thickness portion 3a which is increased in thickness compared with portions 3b of the wall 3.
- the increased thickness portion 3a of the wall 3 is formed in a portion where the wall 3 receives greater heat and/or load greater than other portions 3b of the wall 3 of the resin core 1.
- the resin core 1 includes divided parts 1a and 1b which are formed using injection molding, and adhered to each other to complete the core 1.
- Each of the parts 1a and 1b can be formed to a desired wall thickness at a desired portion of the core.
- the resin core 1 is set within the mold 8 to thereby form the molding cavity 9.
- the mold 8 may be provided with a pressure pin 7.
- the core 1 includes the wall 3 defining a vacant interior therein, and the wall 3 of the core 1 includes at least one increased thickness portion 3a compared with portions 3b of the wall.
- molten metal 6 for example molten aluminum alloy
- a high pressure for example, at a pressure above 80 MPa
- a low pressure When the molten metal solidifies, a cast metal product 4 is produced.
- the core 1 forms an undercut portion or a hollow portion in the cast metal product 4.
- the mold 8 is opened and the cast metal product 4 is taken out from the mold 8.
- the resin core 1 is removed from the cast metal product 4 by deforming the resin core 1 through a hole formed in the cast metal product 4. The removed core is recycled as a material for a new resin core.
- the resin core 1 When removing the resin core 1 from the cast metal product, the resin core 1 is softened by the residual heat from the cast metal product 4 or by reheating the resin core and the metal product, but not enough to melt the cast metal product 4. Because the resin core 1 is not yet completely melted, the resin core 1 can transmit the drawing load and the entire portion of the resin core 1 can be drawn out of the cast metal product 4. Therefore, unlike a completely melted resin core 1, a portion of the resin does not remain in the cast metal product.
- FIG. 9 illustrates the relationship between a temperature change of the resin core and a temperature change of the molten metal in the case where the molten metal is aluminum alloy. More particularly, when the molten aluminum alloy is supplied into the molding cavity, the temperature of the molten aluminum alloy during the time period from t1 to t2 is about 700° C., and the temperature of the molten metal aluminum alloy decreases to about 550° C. within 10 seconds and 3 minutes. The time varies according to a volume of the cast metal product 4.
- the temperature of the resin core 1 rises as it receives the heat from the molten metal.
- the temperature of the resin core 1 has not yet risen to the beginning of the softening of the resin (about 150° C.) at a solidification completing time t3 of the molten metal. Therefore, the molten metal completes its solidification while the resin core 1 is in a solid state. As a result, the resin core 1 is unlikely to cause a deformation even if it receives a high pressure of high load from the molten metal, so that a cast metal product 4 having a better dimensional accuracy can be obtained.
- the resin core 1 then rises in temperature and begins to soften at the softening beginning point (about 150° C.).
- the mold 8 is opened and preferably at a time after the softening beginning time of the resin core. Removing the resin core 1 from the cast metal product 4 is performed after the mold opening time t4 and before the resin core 1 is completely melted, that is, while the resin core 1 is in a softened state (in a case of a crystal-type resin, before the core 1 is melted).
- the softened state means that an elastic rate of the resin is in the approximate range of 10 -2 -10 -5 GPa.
- thermoplastic resin showing the above-described softening and melting characteristics best includes crystal resins such as polypropylene and non-crystal-plastics, for example, polycarbonate, polystyrene (high impact polystyrene), and ABS resin, though the non-crystal-plastics do not have a melting point.
- the wall 3 of the resin core 1 includes the increased thickness portion 3a at a portion where the wall 3 receives a greater load and/or heat than other portions 3b of the wall 3. Therefore, the resin core 1 is unlikely to cause a deformation and breakage at the increased thickness portion 3a when the core 1 receives a load and heat from the molten metal supplied into the molding cavity. As a result, deformation of the cast metal product 4 will also be prevented at the portion of the product corresponding to the increased thickness portion 3a of the core 1. Furthermore, since the wall 3 of the core 1 is increased in thickness only locally, costs for the resin core 1 can be suppressed.
- the resin core 1 includes two parts 1a and 1b which define a vacant interior 2 therein when the two parts are joined to each other.
- the wall 3 of the core 1 includes a plurality of increased thickness portions 3a which can be formed due to the two part structure of the core.
- the cast metal product 4 includes an increased thickness portion 4a.
- a portion of the wall 3 of the resin core 1 contacts the increased thickness portion 4a of the cast metal product 4.
- the increased thickness portion 3a of the wall 3 of the resin core 1 is formed in the portion of the wall 3 that contacts the increased thickness portion 4a of the cast metal product 4.
- the core 1 also is thickened to have a large heat resistance at the portion corresponding to the increased thickness portion 4a so that the core 1 can endure the heat and load.
- the increased thickness portion 3a of the wall 3 of the core 1 is unlikely to be softened before the molten metal has solidified and therefore, a better dimensional accuracy of the cast metal product 4 can be obtained.
- the cast metal product 4 includes a rib 4b having a root 4c.
- a portion of the wall 3 of the resin core 1 contacts the root 4c of the rib 4b of the cast metal product 4.
- the increased thickness portion 3a is formed in the portion of the wall 3 that contacts the root 4c so as to protrude into the root 4c of the rib 4b.
- the root 4c of the rib 4b has a greater thickness or volume than other portions of the cast metal product 4 so that it solidifies later than other portions of the cast metal product 4 and a shrinkage hole 4d is likely to be caused.
- the protruding portion 3b contacts and pushes the root 4c of the rib 4b of the cast metal product 4, a shrinkage hole 4d is prevented.
- the mold 8 includes a molten metal injection gate 5 through which the molten metal 6 is supplied into a molding cavity 9.
- the increased thickness portion 3a of the wall 3 of the resin core 1 is formed in the portion of the wall 3 of the resin core 1 opposing the molten metal injection gate 5.
- the molten metal 6 is usually supplied into the molding cavity at a high speed, as high as about 40 m/sec, and at a high pressure, as high as about 80 MPa, the portion of the core 1 opposing the injection gate 5 is likely to receive a large load and heat from the supplied molten metal and therefore to break. However, since the portion of the core 1 opposing the injection gate 5 is increased in thickness, that portion of the core 1 can endure the load and heat and thereby prevent breakage of the resin core 1.
- the casting apparatus includes a pressure pin 7 which penetrates the casting mold 8 so that the pressure pin 7 can press a portion of the molten metal having a great volume (a portion likely corresponding to the increased thickness portion of the cast metal product) before the metal solidifies.
- a portion of the wall 3 of the resin core 1 opposes the pressure pin 7.
- the increased thickness portion 3a of the wall 3 is formed to oppose the pressure pin 7.
- the portion of the wall 3 that opposes the pressure pin 7 also receives the pressing force of the pressure pin 7.
- the portion of the core 1 is increased in thickness 3a, it can endure the pressing force of the pressure pin 7 and prevent damage or deformation of the resin core 1.
- the resin core 1 can effectively endure the heat and/or load since the wall 3 of the resin core 1 is increased in thickness in places.
- the wall 3 of the resin core 1 is increased in thickness only in certain places and therefore, the increase in manufacturing cost of the resin core 1 is minimized.
Abstract
Description
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7-228392 | 1995-09-05 | ||
JP7228392A JPH0970644A (en) | 1995-09-05 | 1995-09-05 | Resin core |
Publications (1)
Publication Number | Publication Date |
---|---|
US5957191A true US5957191A (en) | 1999-09-28 |
Family
ID=16875755
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/707,455 Expired - Fee Related US5957191A (en) | 1995-09-05 | 1996-09-04 | Casting method and apparatus using a resin core |
Country Status (3)
Country | Link |
---|---|
US (1) | US5957191A (en) |
JP (1) | JPH0970644A (en) |
DE (1) | DE19635920C2 (en) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8724302B2 (en) | 2012-03-02 | 2014-05-13 | Microsoft Corporation | Flexible hinge support layer |
US8733423B1 (en) * | 2012-10-17 | 2014-05-27 | Microsoft Corporation | Metal alloy injection molding protrusions |
US8850241B2 (en) | 2012-03-02 | 2014-09-30 | Microsoft Corporation | Multi-stage power adapter configured to provide low power upon initial connection of the power adapter to the host device and high power thereafter upon notification from the host device to the power adapter |
US8873227B2 (en) | 2012-03-02 | 2014-10-28 | Microsoft Corporation | Flexible hinge support layer |
US9027631B2 (en) | 2012-10-17 | 2015-05-12 | Microsoft Technology Licensing, Llc | Metal alloy injection molding overflows |
US9064654B2 (en) | 2012-03-02 | 2015-06-23 | Microsoft Technology Licensing, Llc | Method of manufacturing an input device |
US9075566B2 (en) | 2012-03-02 | 2015-07-07 | Microsoft Technoogy Licensing, LLC | Flexible hinge spine |
US9073123B2 (en) | 2012-06-13 | 2015-07-07 | Microsoft Technology Licensing, Llc | Housing vents |
CN105188988A (en) * | 2013-03-15 | 2015-12-23 | 联合工艺公司 | Cast component having corner radius to reduce recrystallization |
US9354748B2 (en) | 2012-02-13 | 2016-05-31 | Microsoft Technology Licensing, Llc | Optical stylus interaction |
US9360893B2 (en) | 2012-03-02 | 2016-06-07 | Microsoft Technology Licensing, Llc | Input device writing surface |
US9426905B2 (en) | 2012-03-02 | 2016-08-23 | Microsoft Technology Licensing, Llc | Connection device for computing devices |
US9432070B2 (en) | 2012-10-16 | 2016-08-30 | Microsoft Technology Licensing, Llc | Antenna placement |
US9759854B2 (en) | 2014-02-17 | 2017-09-12 | Microsoft Technology Licensing, Llc | Input device outer layer and backlighting |
US9824808B2 (en) | 2012-08-20 | 2017-11-21 | Microsoft Technology Licensing, Llc | Switchable magnetic lock |
US9870066B2 (en) | 2012-03-02 | 2018-01-16 | Microsoft Technology Licensing, Llc | Method of manufacturing an input device |
US10120420B2 (en) | 2014-03-21 | 2018-11-06 | Microsoft Technology Licensing, Llc | Lockable display and techniques enabling use of lockable displays |
US10156889B2 (en) | 2014-09-15 | 2018-12-18 | Microsoft Technology Licensing, Llc | Inductive peripheral retention device |
US10324733B2 (en) | 2014-07-30 | 2019-06-18 | Microsoft Technology Licensing, Llc | Shutdown notifications |
US10678743B2 (en) | 2012-05-14 | 2020-06-09 | Microsoft Technology Licensing, Llc | System and method for accessory device architecture that passes via intermediate processor a descriptor when processing in a low power state |
USRE48963E1 (en) | 2012-03-02 | 2022-03-08 | Microsoft Technology Licensing, Llc | Connection device for computing devices |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102601318B (en) * | 2011-12-15 | 2013-12-11 | 宁夏共享集团有限责任公司 | Casting method for thin-wall annular cast |
JP5827644B2 (en) * | 2013-06-27 | 2015-12-02 | シナノケンシ株式会社 | Casting parts manufacturing method |
DE102018121847A1 (en) * | 2018-09-07 | 2020-03-12 | Hengst Se | Process for metal die casting with lost core |
JP7063973B1 (en) * | 2020-11-27 | 2022-05-09 | 三菱重工業株式会社 | Manufacturing method of vortex generator for wind turbine blades, wind turbine blades and wind power generators, and wind turbine blades |
Citations (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4093175A (en) * | 1973-10-03 | 1978-06-06 | Precision Flexmold, Inc. | Distensible elastomeric molds |
US4927688A (en) * | 1986-12-15 | 1990-05-22 | Eisengiesserei Monforts Gmbh & Co. | Cast-iron element |
US5285840A (en) * | 1991-09-30 | 1994-02-15 | Aisin Seiki Kabushiki Kaisha | Method and apparatus for manufacturing piston of internal combustion engine |
JPH0691345A (en) * | 1992-07-30 | 1994-04-05 | Masaru Nemoto | Special core for casting |
JPH0699247A (en) * | 1992-08-03 | 1994-04-12 | Masaru Nemoto | Casting method using special core |
JPH0699436A (en) * | 1992-08-03 | 1994-04-12 | Masaru Nemoto | Molding method using special core |
JPH06122037A (en) * | 1992-07-30 | 1994-05-06 | Masaru Nemoto | Special core for casting |
JPH06126376A (en) * | 1992-07-30 | 1994-05-10 | Masaru Nemoto | Special core for casting |
JPH06198388A (en) * | 1992-08-03 | 1994-07-19 | Masaru Nemoto | Molding method using special core for molding |
JPH06292941A (en) * | 1992-07-30 | 1994-10-21 | Masaru Nemoto | Cast product cast by using special core |
JPH06328195A (en) * | 1993-05-20 | 1994-11-29 | Masaru Nemoto | Core and manufacture of molding using the core |
JPH071080A (en) * | 1992-07-30 | 1995-01-06 | Masaru Nemoto | Special molding core |
JPH071079A (en) * | 1992-07-30 | 1995-01-06 | Masaru Nemoto | Special molding core |
JPH07195144A (en) * | 1993-12-29 | 1995-08-01 | Masaru Nemoto | Special core for molding |
JPH07195147A (en) * | 1993-12-29 | 1995-08-01 | Masaru Nemoto | Molding method using special core for molding |
JPH07195145A (en) * | 1993-12-29 | 1995-08-01 | Masaru Nemoto | Special core for molding |
JPH0890158A (en) * | 1994-07-11 | 1996-04-09 | Toyota Motor Corp | Core and removing method thereof |
US5566742A (en) * | 1994-04-13 | 1996-10-22 | Nemoto; Masaru | Casting method using core made of synthetic resin, core made of synthetic resin, and cast product |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU677903B2 (en) * | 1994-06-01 | 1997-05-08 | Toyota Jidosha Kabushiki Kaisha | Casting method with improved resin core removing step and apparatus for performing the method |
-
1995
- 1995-09-05 JP JP7228392A patent/JPH0970644A/en not_active Withdrawn
-
1996
- 1996-09-04 US US08/707,455 patent/US5957191A/en not_active Expired - Fee Related
- 1996-09-04 DE DE19635920A patent/DE19635920C2/en not_active Expired - Fee Related
Patent Citations (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4093175A (en) * | 1973-10-03 | 1978-06-06 | Precision Flexmold, Inc. | Distensible elastomeric molds |
US4927688A (en) * | 1986-12-15 | 1990-05-22 | Eisengiesserei Monforts Gmbh & Co. | Cast-iron element |
US5285840A (en) * | 1991-09-30 | 1994-02-15 | Aisin Seiki Kabushiki Kaisha | Method and apparatus for manufacturing piston of internal combustion engine |
JPH06292941A (en) * | 1992-07-30 | 1994-10-21 | Masaru Nemoto | Cast product cast by using special core |
JPH0691345A (en) * | 1992-07-30 | 1994-04-05 | Masaru Nemoto | Special core for casting |
JPH071079A (en) * | 1992-07-30 | 1995-01-06 | Masaru Nemoto | Special molding core |
JPH06122037A (en) * | 1992-07-30 | 1994-05-06 | Masaru Nemoto | Special core for casting |
JPH06126376A (en) * | 1992-07-30 | 1994-05-10 | Masaru Nemoto | Special core for casting |
JPH071080A (en) * | 1992-07-30 | 1995-01-06 | Masaru Nemoto | Special molding core |
JPH0699247A (en) * | 1992-08-03 | 1994-04-12 | Masaru Nemoto | Casting method using special core |
JPH06198388A (en) * | 1992-08-03 | 1994-07-19 | Masaru Nemoto | Molding method using special core for molding |
JPH0699436A (en) * | 1992-08-03 | 1994-04-12 | Masaru Nemoto | Molding method using special core |
JPH06328195A (en) * | 1993-05-20 | 1994-11-29 | Masaru Nemoto | Core and manufacture of molding using the core |
JPH07195144A (en) * | 1993-12-29 | 1995-08-01 | Masaru Nemoto | Special core for molding |
JPH07195147A (en) * | 1993-12-29 | 1995-08-01 | Masaru Nemoto | Molding method using special core for molding |
JPH07195145A (en) * | 1993-12-29 | 1995-08-01 | Masaru Nemoto | Special core for molding |
US5566742A (en) * | 1994-04-13 | 1996-10-22 | Nemoto; Masaru | Casting method using core made of synthetic resin, core made of synthetic resin, and cast product |
JPH0890158A (en) * | 1994-07-11 | 1996-04-09 | Toyota Motor Corp | Core and removing method thereof |
Cited By (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9354748B2 (en) | 2012-02-13 | 2016-05-31 | Microsoft Technology Licensing, Llc | Optical stylus interaction |
US9426905B2 (en) | 2012-03-02 | 2016-08-23 | Microsoft Technology Licensing, Llc | Connection device for computing devices |
US8873227B2 (en) | 2012-03-02 | 2014-10-28 | Microsoft Corporation | Flexible hinge support layer |
US8854799B2 (en) | 2012-03-02 | 2014-10-07 | Microsoft Corporation | Flux fountain |
US8724302B2 (en) | 2012-03-02 | 2014-05-13 | Microsoft Corporation | Flexible hinge support layer |
US8947864B2 (en) | 2012-03-02 | 2015-02-03 | Microsoft Corporation | Flexible hinge and removable attachment |
USRE48963E1 (en) | 2012-03-02 | 2022-03-08 | Microsoft Technology Licensing, Llc | Connection device for computing devices |
US9360893B2 (en) | 2012-03-02 | 2016-06-07 | Microsoft Technology Licensing, Llc | Input device writing surface |
US9064654B2 (en) | 2012-03-02 | 2015-06-23 | Microsoft Technology Licensing, Llc | Method of manufacturing an input device |
US9075566B2 (en) | 2012-03-02 | 2015-07-07 | Microsoft Technoogy Licensing, LLC | Flexible hinge spine |
US10013030B2 (en) | 2012-03-02 | 2018-07-03 | Microsoft Technology Licensing, Llc | Multiple position input device cover |
US9111703B2 (en) | 2012-03-02 | 2015-08-18 | Microsoft Technology Licensing, Llc | Sensor stack venting |
US9134807B2 (en) | 2012-03-02 | 2015-09-15 | Microsoft Technology Licensing, Llc | Pressure sensitive key normalization |
US9134808B2 (en) | 2012-03-02 | 2015-09-15 | Microsoft Technology Licensing, Llc | Device kickstand |
US9146620B2 (en) | 2012-03-02 | 2015-09-29 | Microsoft Technology Licensing, Llc | Input device assembly |
US9158384B2 (en) | 2012-03-02 | 2015-10-13 | Microsoft Technology Licensing, Llc | Flexible hinge protrusion attachment |
US9904327B2 (en) | 2012-03-02 | 2018-02-27 | Microsoft Technology Licensing, Llc | Flexible hinge and removable attachment |
US9176900B2 (en) | 2012-03-02 | 2015-11-03 | Microsoft Technology Licensing, Llc | Flexible hinge and removable attachment |
US9870066B2 (en) | 2012-03-02 | 2018-01-16 | Microsoft Technology Licensing, Llc | Method of manufacturing an input device |
US9268373B2 (en) | 2012-03-02 | 2016-02-23 | Microsoft Technology Licensing, Llc | Flexible hinge spine |
US9852855B2 (en) | 2012-03-02 | 2017-12-26 | Microsoft Technology Licensing, Llc | Pressure sensitive key normalization |
US10963087B2 (en) | 2012-03-02 | 2021-03-30 | Microsoft Technology Licensing, Llc | Pressure sensitive keys |
US8850241B2 (en) | 2012-03-02 | 2014-09-30 | Microsoft Corporation | Multi-stage power adapter configured to provide low power upon initial connection of the power adapter to the host device and high power thereafter upon notification from the host device to the power adapter |
US9176901B2 (en) | 2012-03-02 | 2015-11-03 | Microsoft Technology Licensing, Llc | Flux fountain |
US9460029B2 (en) | 2012-03-02 | 2016-10-04 | Microsoft Technology Licensing, Llc | Pressure sensitive keys |
US9465412B2 (en) | 2012-03-02 | 2016-10-11 | Microsoft Technology Licensing, Llc | Input device layers and nesting |
US9618977B2 (en) | 2012-03-02 | 2017-04-11 | Microsoft Technology Licensing, Llc | Input device securing techniques |
US9619071B2 (en) | 2012-03-02 | 2017-04-11 | Microsoft Technology Licensing, Llc | Computing device and an apparatus having sensors configured for measuring spatial information indicative of a position of the computing devices |
US9678542B2 (en) | 2012-03-02 | 2017-06-13 | Microsoft Technology Licensing, Llc | Multiple position input device cover |
US9710093B2 (en) | 2012-03-02 | 2017-07-18 | Microsoft Technology Licensing, Llc | Pressure sensitive key normalization |
US9793073B2 (en) | 2012-03-02 | 2017-10-17 | Microsoft Technology Licensing, Llc | Backlighting a fabric enclosure of a flexible cover |
US9766663B2 (en) | 2012-03-02 | 2017-09-19 | Microsoft Technology Licensing, Llc | Hinge for component attachment |
US10678743B2 (en) | 2012-05-14 | 2020-06-09 | Microsoft Technology Licensing, Llc | System and method for accessory device architecture that passes via intermediate processor a descriptor when processing in a low power state |
US9073123B2 (en) | 2012-06-13 | 2015-07-07 | Microsoft Technology Licensing, Llc | Housing vents |
US9824808B2 (en) | 2012-08-20 | 2017-11-21 | Microsoft Technology Licensing, Llc | Switchable magnetic lock |
US9432070B2 (en) | 2012-10-16 | 2016-08-30 | Microsoft Technology Licensing, Llc | Antenna placement |
US8733423B1 (en) * | 2012-10-17 | 2014-05-27 | Microsoft Corporation | Metal alloy injection molding protrusions |
US9027631B2 (en) | 2012-10-17 | 2015-05-12 | Microsoft Technology Licensing, Llc | Metal alloy injection molding overflows |
US8991473B2 (en) | 2012-10-17 | 2015-03-31 | Microsoft Technology Holding, LLC | Metal alloy injection molding protrusions |
CN105188988A (en) * | 2013-03-15 | 2015-12-23 | 联合工艺公司 | Cast component having corner radius to reduce recrystallization |
US9759854B2 (en) | 2014-02-17 | 2017-09-12 | Microsoft Technology Licensing, Llc | Input device outer layer and backlighting |
US10120420B2 (en) | 2014-03-21 | 2018-11-06 | Microsoft Technology Licensing, Llc | Lockable display and techniques enabling use of lockable displays |
US10324733B2 (en) | 2014-07-30 | 2019-06-18 | Microsoft Technology Licensing, Llc | Shutdown notifications |
US10156889B2 (en) | 2014-09-15 | 2018-12-18 | Microsoft Technology Licensing, Llc | Inductive peripheral retention device |
Also Published As
Publication number | Publication date |
---|---|
JPH0970644A (en) | 1997-03-18 |
DE19635920C2 (en) | 1998-12-17 |
DE19635920A1 (en) | 1997-03-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5957191A (en) | Casting method and apparatus using a resin core | |
JP2000005859A (en) | Electronic equipment, its manufacture, and die device | |
EP0642855B1 (en) | Casting mold | |
KR100204409B1 (en) | Casting method with improved resin core removal step | |
JP4801987B2 (en) | Molding method and molding apparatus | |
CA1289319C (en) | Molding method and apparatus | |
CN220782212U (en) | Back-off structure for improving product deformation and increasing packing force of one side of casting and die | |
JPH09248653A (en) | Casting method using resin core | |
JPH09207136A (en) | Mold for resin molding and manufacture thereof | |
JP2807980B2 (en) | Manufacturing method of hollow injection molded products | |
US6071449A (en) | Acoustic diaphragm molding metal mold apparatus and acoustic diaphragm molding method | |
JP2004009682A (en) | Mold | |
JPH06198388A (en) | Molding method using special core for molding | |
JPH07195147A (en) | Molding method using special core for molding | |
JPH09277014A (en) | Production of light alloy die cast product using resin core and hollow light alloy die cast product | |
KR100240581B1 (en) | Method of manufacturing power steering oil pump housing | |
JPH0825017A (en) | Removal method of resin core | |
JPH079106A (en) | Compression casting method | |
EP0691165A2 (en) | Method and apparatus for producing a cast metal product | |
JPH1034314A (en) | Method for casting product having metal-base composite material part | |
JP2831959B2 (en) | Manufacturing method of plastic molded article and plastic molding apparatus | |
JPH0434987Y2 (en) | ||
JP2900846B2 (en) | How to pull out resin core | |
JP2741283B2 (en) | Mold manufacturing method | |
JPH09253822A (en) | Production method of light alloy die casting using core |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: AISIN SEIKI KABUSHIKI KAISHA, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:OKADA, MASAMICHI;SAWAMURA, TATSUHIKO;HAYASHI, NORIO;AND OTHERS;REEL/FRAME:008247/0504;SIGNING DATES FROM 19960829 TO 19960902 Owner name: TOYOTA JIDOSHA KABUSHIKI KAISHA, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:OKADA, MASAMICHI;SAWAMURA, TATSUHIKO;HAYASHI, NORIO;AND OTHERS;REEL/FRAME:008247/0504;SIGNING DATES FROM 19960829 TO 19960902 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20070928 |